Method for preparing continuous carbon fiber-reinforced thermoplastic prepreg

US20150336369A1Active Publication Date: 2015-11-26POSCO HLDG INC +1
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
Publication Date
2015-11-26

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Abstract

The present invention relates to a method for preparing a continuous carbon fiber-reinforced thermoplastic prepreg, and more specifically, to a method for preparing a continuous carbon fiber-reinforced thermoplastic semi-prepreg or prepreg, comprising the steps of: providing a plurality of carbon fibers having an increased width; preparing a layered product by arranging a thermoplastic film on at least a part of the upper and lower portions of the carbon fibers having an increased width; and preparing a joined product by joining the thermoplastic film and the carbon fibers comprising the layered body.
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Description

TECHNICAL FIELD

[0001] The present disclosure relates to a method for manufacturing a continuous carbon fiber reinforced thermoplastic prepreg, and more particularly, to a method for manufacturing a continuous carbon fiber reinforced thermoplastic prepreg by disposing a carbon fiber layer between a plurality of layers of thermoplastic film and bonding the carbon fiber layer and the layers of thermoplastic film to each other instead of directly impregnating the carbon fiber with melted thermoplastic resin.BACKGROUND ART

[0002] Generally, continuous carbon fiber reinforced thermoplastics are formed by continuously embedding a reinforcing fiber such as a glass fiber or a carbon fiber in a plastic having a relatively low degree of mechanical strength. Such continuous carbon fiber reinforced thermoplastics have very high degrees of mechanical strength, rigidity, and impact resistance, as compared to short fiber reinforced thermoplastics (SFTs) having reinforcing fibers contained therein havi...

Examples

examples

[0077]1. Manufacturing of CFRTP Plates

[0078]Continuous carbon fiber (CF) tape was formed of a widely spread / coated carbon fiber (CF) and a thermoplastic resin film through stacking, fusing, and impregnating processes, and the continuous CF tape was arranged in layers within a 100 mm×180 mm steel die. Then, the steel die was heated to 270° C. to fuse the thermoplastic resin film and to thus bond layers of the continuous CF tape together, and unidirectional CFRTP plate samples were formed of the CF tape through a hot pressing process by applying a pressure of up to 10 MPa to the CF tape and cooling the CF tape.

[0079]2. Evaluation of Flexural Properties

[0080]CFRTP plates fabricated as described in the aforementioned section 1 were cut into shapes having dimensions of 12.7 mm (w)×127 mm (d) as illustrated in FIG. 8B, and flexural properties of the CFRTP samples were measured by a standard measuring method stated in ASTM D790 by using a flexural properties tester (Instron UTM 5569A) as i...